The gravitational wave signal generated by the coalescence of a second binary system of black holes has been detected the 26 December 2015 by both of the twin Laser Interferometer Gravitational-Wave Observatory (LIGO) detectors, located in Livingston, Louisiana, and Hanford, Washington, USA.

The discovery of GW151226 was made by the LIGO Scientific Collaboration (which includes the GEO Collaboration and the Australian Consortium for Interferometric Gravitational Astronomy) and the Virgo Collaboration using data from the two LIGO detectors.

The early stage researchers of the GraWIToN project fully participated to the scientific activities related to this new fundamental discovery. What a exciting period and what exciting project!